CHANGES IN THE CHALK HEART-URCHIN MICRASTER INTERPRETED IN RELATION TO LIVING FORMS

[1] ALLEN EJ, 1900, J MAR BIOL ASSOC UK, V6, P151

[2] ALLEN EJ, 1896, J MAR BIOL ASSOC UK, V4, P164

[3] BRADY GS, 1872, NAT HIST T NEWCASTLE, V4, P513

[4] BRATTSTROM HANS, 1946, ARKIV ZOOL [STOCKHOLM], V37A, P1

[5] Brydone R.M., 1912, STRATIGRAPHY CHALK H

[6] Cain Arthur J., 1954, ANIMAL SPECIES THEIR

[7] Chumley J., 1918, FAUNA CLYDE SEA AREA

[8] Davis F. M., 1923, Fishery Investigations Board of Agriculture London Ser II, V6, P1

[9] Davis F. M., 1925, Fish Invest Ministr Agr London (2), V8, P1

[10] Ford E., 1923, Journal of the Marine Biological Association Plymouth NS, V18, P164

[1] ALLEN EJ, 1900, J MAR BIOL ASSOC UK, V6, P151

[2] ALLEN EJ, 1896, J MAR BIOL ASSOC UK, V4, P164

[3] BRADY GS, 1872, NAT HIST T NEWCASTLE, V4, P513

[4] BRATTSTROM HANS, 1946, ARKIV ZOOL [STOCKHOLM], V37A, P1

[5] Brydone R.M., 1912, STRATIGRAPHY CHALK H

[6] Cain Arthur J., 1954, ANIMAL SPECIES THEIR

[7] Chumley J., 1918, FAUNA CLYDE SEA AREA

[8] Davis F. M., 1923, Fishery Investigations Board of Agriculture London Ser II, V6, P1

[9] Davis F. M., 1925, Fish Invest Ministr Agr London (2), V8, P1

[10] Ford E., 1923, Journal of the Marine Biological Association Plymouth NS, V18, P164